Voice and data telephone communication system and method
US5014306A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1988 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Nov 14, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a digital switch high data rate data communications system, such as a "Datapath" system following the "T Link" protocol, to intercouple data terminal equipment operating at different data rates, voice messages are concurrently interleaved in transmitted bit streams. The system includes echo suppression modules for voice transmissions, but for data transmissions the echo suppression means is disabled in a channel by digital simulation of a monofrequency tone to open the channel. The preparatory sequence includes predetermined byte sequences which initiate the exchange of version identifier and parameter data prior to selection of a common data rate for intercommunication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.